Client Lock/Unlock on SAP

From SAP

To lock or unlock a client in R/3 System, run the following function modules in transaction SE37

1. SCCR_LOCK_CLIENT (to lock the client)
2. SCCR_UNLOCK_CLIENT (to unlock the client)

Run these functions with a client input which is to be locked/unlocked. This function set flag '' Client is locked temporarily for client copy" in client maintenance menu. The client will be available for users DDIC and SAP*. If any other user tries to login, system gives message that ' Client locked temporarily'.


To Unlock the client

1. Run transaction SE37
2. Enter the function module as SCCR_UNLOCK_CLIENT
3. Press F8 or test run (single run).
4. Specify the client and execute (F8).

Follow similar procedure for locking the client

To Lock the client

There is no direct tcode to lock a client. the easiest way to Lock a client is 
1. Run Tcode SE37
2. Type function module name SCCR_LOCK_CLIENT
3. Enter the Client No.
4. Execute the function module.

From OS level  

To Lock/Unlock Client from OS Level, Login as <SID>adm and execute the below commands.

TP LOCKSYS <SID> <client nr> pf=<usr/.../tp_domain.pfl>    (Lock Client)

TP UNLOCKSYS <SID> <client nr> pf=<usr/.../tp_domain.pfl>   (Unlock Client)

To Lock/Unlock entire system

If you want to lock entire system instead of each client then the commands as follows 

TP LOCKSYS <SID>  pf=<usr/.../tp_domain.pfl>    (Lock all Clients)

TP UNLOCKSYS <SID>  pf=<usr/.../tp_domain.pfl>   (Unlock all Clients)

Note: only DDIC/SAP* can login to any client when system is in Lock mode.

THANK YOU